The Measurement of theIn113*Conversion Coefficient with a Scintillation Spectrometer

Abstract

The internal conversion coefficient of the 0.39-Mev isomeric transition of ${\mathrm{In}}^{113*}$ has been determined with a scintillation spectrometer by measurements which involve only gamma-gamma and electron-electron intensity comparisons. A value of $\alpha =0.55\mathrm{}\pm 0.03$ is obtained for the total conversion coefficient of this transition. Thus the $K$-conversion coefficient is 0.46±0.03 if one uses the $K$ to $L$ conversion ratio of 5.4±0.8 as determined by Lawson and Cork. This value is in good agreement with the value of 0.47 which is obtained from Rose's tables for magnetic $2^4$-pole radiation.